Pop-Up Catapult (Print in Place)

A small catapult that prints in one piece, already assembled, and pops up ready to launch. Version 1.1 adds features for education and fixes the print-in-place clearance.

Use it for stored (elastic) energy turning into movement, projectile paths and fair testing: change one thing (angle, pull-back, projectile mass) and measure the distance.

Design by highpoly on Printables, shared under CC BY-SA 4.0. The files and photos are the designer's, unchanged.

1. Print it in one go, no supports. Let it cool before freeing the moving parts.
2. Launch small, soft projectiles (pompoms, paper balls) only, away from faces.
3. Groups plan a fair test, record distances in a table and plot a graph.